Transcript
MP3399 The Future of Analog IC Technology
12-String, Cascading White LED Driver For Extending LED Channels
DESCRIPTION
FEATURES
The MP3399 is a step-up controller with 12channel current sources designed for driving the WLED arrays for large size LCD panel backlighting applications. The MP3399 is flexible for extending LED channels with two or more MP3399s in parallel while operating from a single Inductor power source.
• •
The MP3399 uses current mode, fixed frequency architecture. The switching frequency is programmable by an external frequency setting resistor. It drives an external MOSFET to boost up the output voltage from a 5V to 28V input supply. The MP3399 regulates the current in each LED string to the programmed value set by an external current setting resistor.
• • • • • • •
The MP3399 applies 12 internal current sources for current balance. And the current matching can achieve 2.5% regulation accuracy between strings. Its low 600mV regulation voltage on LED current sources reduces power loss and improves efficiency. PWM dimming is implemented with external PWM input signal or DC input signal. The dimming PWM signal can be generated internally, and the dimming frequency is programmed by an external setting capacitor.
MP3399 Rev. 1.0 3/27/2013
• • •
12 String, 60mA/String WLED Driver Cascading Capability with a single Power Source 5V to 28V Input Voltage Range Maximum 60mA for Each String 2.5% Current Matching Accuracy Between Strings Programmable Switching Frequency PWM or DC Input Burst PWM Dimming Open and Short LED Protection Programmable Over-voltage Protection Under Voltage Lockout Thermal Shutdown 28-pin TSSOP and 28-pin SOIC Package
APPLICATIONS • • •
Desktop LCD Flat Panel Displays Flat Panel Video Displays LCD TVs and Monitors
All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc.
www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved.
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MP3399-12-STRING, CASCADING WHITE LED DRIVER WITH STEP-UP CONTROLLER
TYPICAL APPLICATION M1
D1
L1
VOUT
VIN 5V~28V
CIN
String1
String 12
String 13
String 24
COUT VFAULT
CFAULT RF1 2
VIN
VFAULT
27
RF2
VCC 3
CCOMP
CVCC
GATE
VCC
26
M2
COMP 4
Enable
5
8
ROSC
1
10
COMP
EN
6
DIMMING RSET
9
11
12
13
14
2
CVCC
NC
PGND
OSC
NC
BOSC
RBOSC 7
ISENSE
OVP
MP3399
LED1
GND
LED2
DBRT
LED3
ISET
LED4
LED12
LED5
LED11
LED6
LED10
LED7
LED9
LED8
VIN
VFAULT
24
28
RSENSE
25
23
22
21
20
19
18
17
16
15
27
VCC 3
GATE
VCC
26 VOUT
COMP 4
COMP
ISENSE
24
RF3 5
EN
NC
28
RF4 8
ROSC
1
10
NC
BOSC
RBOSC 7
6
RSET
9
11
12
13
14
MP3399 Rev. 1.0 3/27/2013
PGND
OSC
OVP
MP3399
LED1
GND
LED2
DBRT
LED3
ISET
LED4
LED12
LED5
LED11
LED6
LED10
LED7
LED9
LED8
25
23
22
21
20
19
18
17
16
15
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2
MP3399-12-STRING, CASCADING WHITE LED DRIVER WITH STEP-UP CONTROLLER
ORDERING INFORMATION Part Number
Package
Top Marking
Free Air Temperature (TA)
MP3399EF*
TSSOP28
3399EF
-20°C to +85°C
MP3399EY**
SOIC28
3399EY
-20°C to +85°C
*For Tape & Reel, add suffix –Z (eg. MP3399EF–Z). For RoHS compliant packaging, add suffix –LF (eg. MP3399EF–LF–Z) **For Tape & Reel, add suffix –Z (eg. MP3399EY–Z). For RoHS compliant packaging, add suffix –LF (eg. MP3399EY–LF–Z)
PACKAGE REFERENCE TOP VIEW
TSSOP28
NC
1
28
NC
VIN
2
27
VFAULT
VCC
3
26
GATE
COMP
4
25
PGND ISENSE
EN
5
24
DBRT
6
23
OVP
GND
7
22
LED1
OSC
8
21
LED2
ISET
9
20
LED3
BOSC
10
19
LED4
LED12
11
18
LED5
LED11
12
17
LED6
LED10
13
16
LED7
LED9
14
15
LED8
SOIC28
ABSOLUTE MAXIMUM RATINGS (1)
Thermal Resistance
VIN .................................................-0.3V to +30V VGATE ..............................................-0.5V to 6.8V VVCC ................................................-0.5V to 6.8V VLED1 to VLED12 ..................................-1V to +50V All Other Pins ...............................-0.3V to +6.3V (2) Continuous Power Dissipation (TA = +25°C) TSSOP28…………………………………...3.9 W SOIC28………………………………………2.1W Junction Temperature ...............................150°C Lead Temperature ....................................260°C Storage Temperature............... -65°C to +150°C
TSSOP28 ................................32 ....... 6 .... °C/W
Recommended Operating Conditions
(3)
Supply Voltage VIN ..............................5V to 28V LED Current (Backlight) .............10mA to 60mA Maximum Junction Temp. (TJ) ................+125°C
MP3399 Rev. 1.0 3/27/2013
(4)
θJA
θJC
SOIC28 ..................................60 ...... 30 ... °C/W Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX)-TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operation conditions. 4) Measured on JESD51-7, 4-layer PCB.
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MP3399-12-STRING, CASCADING WHITE LED DRIVER WITH STEP-UP CONTROLLER
ELECTRICAL CHARACTERISTICS VIN =12V, VEN = 5V, TA = +25°C, unless otherwise noted. Parameters
Symbol
Condition
Min
Operating Input Voltage
VIN
Supply Current (Quiescent)
IQ
VIN=12V, VEN=5V, no load with switching
Supply Current (Shutdown)
IST
VEN=0V, VIN=12V
LDO Output Voltage
VCC
Input UVLO Threshold
VIN_UVLO
4.5
VEN=5V, 01.2V, the output will be 100% (See Figure 4). The capacitor on BOSC pin set the frequency of internal triangle waveform according to the equation,: FUNITE = 3.5uF / CUNITE The dimming frequency is recommended set from 100Hz to 2kHz.
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MP3399-12-STRING, CASCADING WHITE LED DRIVER WITH STEP-UP CONTROLLER
Layout Considerations Careful attention must be paid to the PCB board layout and components placement. Proper layout of the high frequency switching path is critical to prevent noise and electromagnetic interference problems. The loop of external MOSFET (M2), output diode (D1), and output capacitor (C5) is flowing with high frequency pulse current. It must be as small as possible (See Figure 5). Figure 4—DC input PWM Dimming Extending LED Channels applications The MP3399 is flexible for extending LED channels with two or more MP3399s in parallel. For the connection of two MP3399s extending 24 strings LEDs, please see the typical application diagram in page 2. Tie the VCC pins of the master IC and the slave IC together to provide the power of the slave IC internal logic circuitry. Also tie the COMP pins of the slave IC and the master IC together to regulate the voltage of all 24 strings LEDs. The MOS driving signals of the slave IC are not used, the boost converter can be only driven by the master IC. Do not let the Isense pin of the slave IC floating, tie it to GND. The EN and Dimming signals should be applied to both ICs. It is recommended to use external PWM dimming mode to achieve the accurate dimming synchronization of both parts.
Figure 5—Layout Consideration The IC exposed pad is internally connected to GND pin, and all logic signals are refer to the GND. The PGND should be externally connected to GND and is recommended to keep away from the logic signals. External MOSFET for Short Protection When output voltage is higher than rating of LED1-12 pins, external MOSFET is needed for each LED channel to avoid destroying LED1 -12 pins. (See Figure 8 for 4 channels application) The rating of MOSFET must be higher than 1.2* VOUT t and more than 1.2* ILED.
MP3399 Rev. 1.0 3/27/2013
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MP3399-12-STRING, CASCADING WHITE LED DRIVER WITH STEP-UP CONTROLLER
TYPICAL APPLICATION CIRCUIT 8V-28V VIN
L1
M1
C3
F1
D1
AM4499P
C13
B180
C16
LED+
C1
C2
C10
NC
R26
NC
C17
NC
5.6nF
R20
R11
GND
GND
C12
10
0
LED1
R51
LED2
C15
499k
GND
NC
GND
GND
LED5
GND
2
VIN
LED6
GND
U1 R54
VFAULT
27
10k
LED7
R22
LED8
0 3
VCC
GATE
R53
26
10k
C9 4
R1
C4
2k
EN
GND
R4
220nF
ISENSE
0
5
8
EN
NC
OSC
PGND
C14 100pF
28
LED9 LED10 LED11
24
R15
C18
20k
COMP
LED3 LED4
M2 AM4490N
R24
R25
0.05
NC
GND
LED12
25
R13
GND
340k
1
NC
OVP
23
R27 0
GND GND
R8
C6
100k
NC
10
7
R2
DIMMING
14S 12P 20mA
BOSC
LED1
22
R28 0
MP3399 GND
LED2
DBRT
LED3
ISET
LED4
LED12
LED5
LED11
LED6
LED10
LED7
LED9
LED8
21
R29 0
2k
GND
NET00016
6
R16
R5 20k
20
R30 0 9
19
60.4k
R31 0
GND 11
18
R32 0
GND 12
17
R33 0 13
16
R34 0 14
15
R35 0 R36 0 R37 0 R38 0
Figure 6—Drive 14 LEDs in Series, 12 Strings 20mA/string
MP3399 Rev. 1.0 3/27/2013
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MP3399-12-STRING, CASCADING WHITE LED DRIVER WITH STEP-UP CONTROLLER
8V-28V
F1
VIN
C1
C2
L1
M1
C3
C17
C10
R26
NC
NC
GND
2
C9
NC GND
VIN
VFAULT
VCC
GND
GATE
LED7
R23
10k
COMP
ISENSE
24
5
EN
NC
8
OSC
PGND
R24
28
C6
NC
OVP
LED12
NC
23
10
BOSC
LED1
22
MP3399 7
R28 0
GND
LED2
DBRT
LED3
21
R2
R29 0
GND
6
20
R16
R5
R30 0 9
20k
GND
R27 0
GND
NC
LED10 LED11
R25
GND 1
GND
R8
LED9
100pF
25
R13
100k
LED8
C14
GND
0
220nF
340k
2k
LED6
R53
R15
C4
C18
R4
LED5
1k
0
26
LED3 LED4
R52
R22
27
0.05 20k
GND
NC
4
LED2
C15
M2 AM4490N
COMP
2k
LED1
VCC 3
R1
R51
C12
VFAULT
10
U1 R54
DIMMING
12S 12/24 P 20mA
357k OVP1
R20 GND
10k
EN
C16
VCC
5.6nF
0
GND
GND
C13
B180
LED+
R11
GND
D1
AM4499P
VIN
NC
ISET
LED4
LED12
LED5
LED11
LED6
19
60.4k
GND
R31 0 11
18
R32 0
GND 12
17
R33 0 13
LED10
LED7
LED9
LED8
16
R34 0 14
15
R35 0 R36 0 R37 0 R38 0
VCC
VIN
VFAULT
R19
R12
2
R21
U2
NC
0
VIN
NC
VFAULT
27
LED13 3 COMP
C7 NC
GND
R7
VCC
GATE
26
LED14
R17 NC
LED15 4
COMP
ISENSE
24
LED16 LED17
0
5
8
EN
NC
OSC
PGND
28
R14 1
GND
10
NC
BOSC
LED1
22
NC
7
GND
GND
LED21
R39 0 R40 0
LED2
LED22 LED23 LED24
21
R41 0
GND
6
DBRT
LED3
ISET
LED4
20
R18
R42 0 9
GND
LED20
100pF
23
MP3399
C8
100k
OVP
LED19
C11
GND
340k
R9
LED18 OVP1
25
19
60.4k
R43 0 11
LED12
LED5
LED11
LED6
LED10
LED7
18
R44 0 12
17
R45 0 13
16
R46 0 14
LED9
LED8
15
R47 0 R48 0 R49 0 R50 0
Figure 7—Drive 12 LEDs in Series, 24 Strings 20mA/string
MP3399 Rev. 1.0 3/27/2013
www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved.
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MP3399-12-STRING, CASCADING WHITE LED DRIVER WITH STEP-UP CONTROLLER
8V-28V VIN
L1
M1
C3
F1
D1
AM4499P
C13
B180
18S 4P 60mA
C16
LED+
C1
C2
C10
NC
NC
C17
R26 NC
5.6nF
R20
R11
GND
10
0
GND
C12
R51
C15
499k
GND
NC
GND
M2 AM4490N GND
GND
U1 R54
2
VIN
VFAULT
27
10k
R22 0
3
VCC
GATE
4
R1
C4
10k
GND
0
5
C18
8
20k
COMP
ISENSE
24
R15 EN
NC
OSC
PGND
28
R25
0.05
NC
GND
LED1
25
LED2
R13
GND
340k
1
NC
OVP
LED3
23
LED4
R27 0
GND
R8
10
BOSC
C6
100k
NC
7
R2
LED1
22
M3
R28 0
MP3399 GND
LED2
DBRT
LED3
ISET
LED4
LED12
LED5
LED11
LED6
LED10
LED7
4
GND
21
NET00016
6
R16
R5 20k
20
R30 0 9
19
60.4k
M4
R31 0
GND 11
4
GND
3
R29 0
2k
18
R32 0
GND 12
17
R33 0 13
3
DIMMING
R24
1,2,5,6
R4
220nF
100pF
M3-M6: AM3490N
LED9
LED8
100V/1A
TSOP6
16
M5 4
R34 0 14
1,2,5,6
2k
EN
C14
R53
26
C9
15
3
R35 0
1,2,5,6
GND
M6 4
R37 0
3
R38 0
1,2,5,6
R36 0
VIN R39 0
R40 NC GND
Figure 8 – Drive 18LEDs in Series, 4 strings 60mA/string Note: For Vin>15V application, use R139 and R40(10kΩ) divider to make a 15V bias voltage for M3-M6.
MP3399 Rev. 1.0 3/27/2013
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17
MP3399-12-STRING, CASCADING WHITE LED DRIVER WITH STEP-UP CONTROLLER
PACKAGE INFORMATION PACKAGE OUTLINE DRAWING FOR 28-TSSOP w/ EXPOSED PADDLE 5.90 TYP 9.60 9.80
0.65 BSC
0.40 TYP
28
15
1.60 TYP
4.30 4.50
PIN 1 ID
3.20 TYP
6.20 6.60
5.80 TYP
14
1
TOP VIEW
RECOMMENDED LAND PATTERN
0.80 1.05
1.20 MAX SEATING PLANE 0.19 0.30
0.65 BSC
0.00 0.15
0.09 0.20 SEE DETAIL "A"
FRONT VIEW
SIDE VIEW
GAUGE PLANE 0.25 BSC 5.70 6.10 0o-8o
0.45 0.75
DETAIL “A” 2.60 3.10
BOTTOM VIEW
MP3399 Rev. 1.0 3/27/2013
NOTE: 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.10 MILLIMETERS MAX. 5) DRAWING CONFORMS TO JEDEC MO-153, VARIATION AET. 6) DRAWING IS NOT TO SCALE.
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MP3399-12-STRING, CASCADING WHITE LED DRIVER WITH STEP-UP CONTROLLER
PACKAGE INFORMATION SOIC28
NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MP3399 Rev. 1.0 3/27/2013
www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved.
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